/*
 * NPlot - A charting library for .NET
 * 
 * MarkerItem.cs
 * Copyright (C) 2003-2006 Matt Howlett and others.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System.Drawing;

namespace NPlot
{
    /// <summary>
    /// Class for placement of a single marker.
    /// </summary>
    public class MarkerItem : IDrawable
    {
        private readonly Marker marker_;
        private readonly double x_;
        private readonly double y_;

        /// <summary>
        /// Constructs a square marker at the (world) point point.
        /// </summary>
        /// <param name="point">the world position at which to place the marker</param>
        public MarkerItem(PointD point)
        {
            marker_ = new Marker(Marker.MarkerType.Square);
            x_ = point.X;
            y_ = point.Y;
        }

        /// <summary>
        /// Default constructor - a square black marker.
        /// </summary>
        /// <param name="x">The world x position of the marker</param>
        /// <param name="y">The world y position of the marker</param>
        public MarkerItem(double x, double y)
        {
            marker_ = new Marker(Marker.MarkerType.Square);
            x_ = x;
            y_ = y;
        }

        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="marker">The marker to place on the chart.</param>
        /// <param name="x">The world x position of the marker</param>
        /// <param name="y">The world y position of the marker</param>
        public MarkerItem(Marker marker, double x, double y)
        {
            marker_ = marker;
            x_ = x;
            y_ = y;
        }

        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="marker">The marker to place on the chart.</param>
        /// <param name="point">The world position of the marker</param>
        public MarkerItem(Marker marker, PointD point)
        {
            marker_ = marker;
            x_ = point.X;
            y_ = point.Y;
        }

        /// <summary>
        /// Draws the marker on a plot surface.
        /// </summary>
        /// <param name="g">graphics surface on which to draw</param>
        /// <param name="xAxis">The X-Axis to draw against.</param>
        /// <param name="yAxis">The Y-Axis to draw against.</param>
        public void Draw(Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
        {
            PointF point = new PointF(
                xAxis.WorldToPhysical(x_, true).X,
                yAxis.WorldToPhysical(y_, true).Y);

            marker_.Draw(g, (int) point.X, (int) point.Y);
        }
    }
}